Answering based on my own experience
1. What currency did you find most useful/convenient?
Sterling for larger purchase, but some Egyptian necessary for smaller stuff or groceries.
2. At the end of the week when paying for extras, bar bill etc. were you able to pay with debit/credit card, if not how was payment made?
MS Grand Star took Sterling, travellers cheques, and cards. However, watch the exchange rate. Might be better off paying in pre-changed Egyptian as thats what they quote in.
3. I've seen somewhere that travellers cheque's were not accepted on the boat. Is this right?
The MS Grand Star accepted them as payment but couldnt change them.
7. Was there any evening entertainment?
Most nights there was something.
8. Did you buy a galabeya if so, where?
Most boats have a boutique, however you will get it cheaper in a bazaar, even one at a temple, but you must haggle. The boutiques on the boats are fixed price.
9. What was the temperature like?
Hot. Monday in Luxor it was 32 degrees C.
10. We're thinking of taking a travel kettle because some reviews I've read (of various boats) seem to say it's the only way to get a good cup of tea/coffee. Would you agree with that?
They dont seem to understand the need for boiling water for tea, so it might not be a bad idea.
11. Were mosquitos or bitey things a problem for you?
Not especially, but some people did suffer. Recommend a mosi-zap.